docstr: Prediction on x.
  :param x: input
  :param batch_size: batch
  :return: predicted y
docstr_tok: ["Prediction","on","x.",":","param","x",":","input",":","param","batch_size",":","batch",":","return",":","predicted","y"]
code: def predict(self, x, batch_size=32):
      """
      Prediction on x.
      :param x: input
      :param batch_size: batch
      :return: predicted y
      """
      if not self.model_built:
          invalidInputError(
              False,
              "You must call fit_eval or restore first before calling predict!",
          )
      return self.model.predict(x, batch_size=batch_size)
  
imports: from bigdl.orca.automl.model.abstract import BaseModel, ModelBuilder
  import numpy
  from bigdl.orca.automl.metrics import Evaluator
  from bigdl.orca.common import SafePickle
  import copy
  import tensorflow
  from tensorflow.keras import backend
  import types
  from bigdl.dllib.utils.log4Error import *
label_desc: Use image node_id 6 for calling the KerasBaseModel obj's underlying member method code with example usage: obj.predict(x, batch_size) and returns: self